66648900 has 36 divisors (see below), whose sum is σ = 192838352. Its totient is φ = 17772960.

The previous prime is 66648899. The next prime is 66648919. The reversal of 66648900 is 984666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110782 + ... + 111381.

Almost surely, 2^66648900 is an apocalyptic number.

66648900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66648900 is an abundant number, since it is smaller than the sum of its proper divisors (126189452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66648900 is a wasteful number, since it uses less digits than its factorization.

66648900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222180 (or 222173 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 66648900 is about 8163.8777550867. The cubic root of 66648900 is about 405.4441096861. Note that the first 3 decimals are identical.

The spelling of 66648900 in words is "sixty-six million, six hundred forty-eight thousand, nine hundred".